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3.5.2
Internal Shutter Speed Control
The video signal starts with internal VD. The camera operates the reset and shutter in the same way as the
external pulse width control mode. When the external VINIT pulse is applied, internal VD is latched to HD and
the internal VD is delayed to set up the shutter speed period. The shutter speed is controlled by the dial switch
from "1" to "8." Video output timing starts right after the internal VD and single shots, FDV is output at the
internal VD timing.
3.6
Programmable Look-Up Table (LUT) and Knee Control
The TM-1402 has a built-in LUT (look-up table) for dynamic range control.
At a specific gain setting, the offset (minimum level.... dark point) and A/D reference top voltage (maximum
level... saturation point) are set to 10-bit A/D input so that the full dynamic range of the CCD is utilized at 10-
bit references as the input and the LUT output is converted into 8-bit to adjust the gamma correction.
The 10-bit input is segmented into two or more regions by the knee-point settings as variable gamma selection.
LUT selections: (a standard LUT is 10 sets of knee-control LUT)
•
Variable Gamma
•
Variable knee curve
•
Direct input LUT
16
TM/TMC/RM/RMC-1402 Series
Operation
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